CVE-2026-28674Public exploitNetwork attack vector

Authenticated RCE via auto-executed plugin upload

Published Mar 18, 2026 · Updated Mar 18, 2026

Unrestricted file upload in xiaoheiFS 0.3.15 and earlier allows remote authenticated users to execute code through the admin API. AdminPaymentPluginUpload accepts any file after checking a hardcoded password, writes it under plugins/payment, and StartWatcher passes new executables to exec.Command every five seconds. Administrator access and the embedded upload password are required; execution occurs with the xiaoheiFS service's operating-system privileges.

CVSS severity7.2
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in xiaoheiFS 0.3.15 and earlier allows remote authenticated users to execute code through the admin API. AdminPaymentPluginUpload accepts any file after checking a hardcoded password, writes it under plugins/payment, and StartWatcher passes new executables to exec.Command every five seconds. Administrator access and the embedded upload password are required; execution occurs with the xiaoheiFS service's operating-system privileges.

The record

CVE
CVE-2026-28674
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
danvei233
Product
xiaoheiFS
Classifications
CWE-434, CWE-798, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

danvei233 · xiaoheiFSversion=< 0.4.0

Published CVSS scores

7.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-798Use of Hard-coded Credentials
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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